According to the theory of optimal currency areas, a central fiscalpolicy is necessary because a single interest rate will not suit conditions in all parts of a currency zone.
根据最优货币区域理论，确立一个中央财政政策很有必要，因为单一利率并不适于货币区域内所有地区的情况。
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But the actual public expenditure scale is only 24.1 per cent by 2000, which shows that China's public expenditure is under optimal situation and the active fiscalpolicy nowadays should be available.